"3DG4 - This tube has different specifications and may not work in all 5U4G amps"

I think it should be made clear that this tube will not work in any 5U4G amp unless it has been specifically wired to have a 3 volt heater pin hookup on the rectifier socket, of which there are no commercially available amps in existence to the best of my knowledge. At best the amp will not function correctly with this tube in the circuit and at worst you'll fry your main power transformer because of the higher heater current draw. Glenn's amps are unique in their ability to use this 3 volt tube.

"3DG4 - This tube has different specifications and may not work in all 5U4G amps"

I think it should be made clear that this tube will not work in any 5U4G amp unless it has been specifically wired to have a 3 volt heater pin hookup on the rectifier socket, of which there are no commercially available amps in existence to the best of my knowledge. At best the amp will not function correctly with this tube in the circuit and at worst you'll fry your main power transformer because of the higher heater current draw. Glenn's amps are unique in their ability to use this 3 volt tube.

Those of a curious nature are duly cautioned.

and in he swoops with words of wisdom....... Thanks for the info. Its a good thing i am getting a glenn otl. Do you have any tubes to add to the list for people like me who would be interested in collecting?

Well, I've never owned a dynamic tube amp, but if I ever decide to get one you have my thanks in advance. At the very least it looks like I'm going to have to start showing up to Head-Fi meets, I'm extremely curious how those 'minty' tubes sound. I've never heard anything audio related described in that way before.